do you mean a kong vault?
He does, but a king kong vault was the original name for it which was eventually shortened to Kong. =D
And if you are trying to learn your kong, the way I usually teach them is find a wall you feel comfortable with, and start trying to pop both your feet up between your hands, on to the top of the wall. As you start to feel more comfortable, do this from a walk, then a run, and then you should be able to just go over it.
Remember, on a shorter wall you will have to use your legs and dip down as close to eye level with the object as you can. BUT when you dip down, you must also jump from further away from the object as well.
Finally, about foot placement; as you set for your kong, have your feet split but still pretty close to eachother, and STILL JUMP OFF BOTH FEET. Alot of people when they are told to split their feet end up trying to kong by lifting one foot at a time. This will really cut your power down.
I think that covers some basics. Any more questions, I'd be happy to help!